$156+ Cheap flights from Ontario to Billings (ONT - BIL)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BIL
Aug 18 — Aug 251
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Billings with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to Billings
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Best
Last-minute
One-way
Cheapest flights from Ontario to BillingsExplore the most affordable flight options available from Ontario to Billings. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 19, 2026.
Explore the most affordable flight options available from Ontario to Billings. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 19, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2411:50 am
ONT
- BIL
1 stop7h 18m
Multiple Airlines
Mon 8/319:57 pm
BIL
- ONT
2 stops17h 06m
Multiple Airlines
Deal found 7/17![Multiple Airlines logo]()
$271
This Expedia deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/179:20 pm
ONT
- BIL
1 stop14h 45m
Alaska Airlines
Tue 8/256:14 am
BIL
- ONT
1 stop5h 50m
Alaska Airlines
Deal found 7/16![Alaska Airlines logo]()
$336
This Booking.com deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/57:12 am
ONT
- BIL
1 stop6h 50m
Alaska Airlines
Tue 9/87:29 pm
BIL
- ONT
1 stop16h 47m
Alaska Airlines
Deal found 7/14![Alaska Airlines logo]()
$359
This Delta deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/101:06 pm
ONT
- BIL
1 stop3h 42m
Delta
Fri 8/146:24 pm
BIL
- ONT
1 stop6h 10m
Delta
Deal found 7/19![Delta logo]()
$361
This Booking.com deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2512:00 pm
ONT
- BIL
1 stop22h 31m
Alaska Airlines
Mon 8/313:42 pm
BIL
- ONT
1 stop5h 42m
Alaska Airlines
Deal found 7/14![Alaska Airlines logo]()
$372
This Booking.com deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/153:14 pm
ONT
- BIL
1 stop7h 15m
Alaska Airlines
Sat 9/196:14 am
BIL
- ONT
1 stop6h 02m
Alaska Airlines
Deal found 7/17![Alaska Airlines logo]()
$377
This Alaska Airlines deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/56:00 am
ONT
- BIL
1 stop8h 08m
Alaska Airlines
Wed 12/96:00 am
BIL
- ONT
1 stop6h 09m
Alaska Airlines
Deal found 7/14![Alaska Airlines logo]()
$384
Best flights from Ontario to BillingsDiscover carefully curated flight deals from Ontario to Billings that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 19, 2026.
Discover carefully curated flight deals from Ontario to Billings that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 19, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2411:50 am
ONT
- BIL
1 stop7h 18m
Multiple Airlines
Mon 8/319:57 pm
BIL
- ONT
2 stops17h 06m
Multiple Airlines
Deal found 7/14![Multiple Airlines logo]()
$275
This Delta deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/101:06 pm
ONT
- BIL
1 stop3h 42m
Delta
Fri 8/146:24 pm
BIL
- ONT
1 stop6h 10m
Delta
Deal found 7/19![Delta logo]()
$361
This Alaska Airlines deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/56:00 am
ONT
- BIL
1 stop8h 08m
Alaska Airlines
Wed 12/96:00 am
BIL
- ONT
1 stop6h 09m
Alaska Airlines
Deal found 7/14![Alaska Airlines logo]()
$384
This United Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/291:18 pm
ONT
- BIL
1 stop6h 42m
United Airlines
Sun 9/65:07 am
BIL
- ONT
2 stops8h 05m
United Airlines
Deal found 7/15![United Airlines logo]()
$414
This Delta deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/126:00 am
ONT
- BIL
1 stop4h 07m
Delta
Fri 8/145:20 am
BIL
- ONT
1 stop4h 32m
Delta
Deal found 7/19![Delta logo]()
$361
This Delta deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/185:05 pm
ONT
- BIL
1 stop4h 20m
Delta
Sun 8/235:20 am
BIL
- ONT
1 stop4h 32m
Delta
Deal found 7/17![Delta logo]()
$361
This Alaska Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/27:12 am
ONT
- BIL
2 stops10h 28m
Alaska Airlines
Sun 9/66:14 am
BIL
- ONT
1 stop5h 50m
Alaska Airlines
Deal found 7/17![Alaska Airlines logo]()
$452
This United Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/85:00 am
ONT
- BIL
1 stop7h 22m
United Airlines
Thu 8/132:29 pm
BIL
- ONT
1 stop7h 24m
United Airlines
Deal found 7/15![United Airlines logo]()
$466
This Delta deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/176:00 am
ONT
- BIL
1 stop4h 07m
Delta
Wed 8/265:20 am
BIL
- ONT
1 stop4h 32m
Delta
Deal found 7/16![Delta logo]()
$413
This Alaska Airlines deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/253:07 pm
ONT
- BIL
1 stop7h 22m
Alaska Airlines
Sun 8/306:14 am
BIL
- ONT
2 stops10h 56m
Alaska Airlines
Deal found 7/14![Alaska Airlines logo]()
$457
Last-minute flights from Ontario to BillingsDiscover last-minute flight deals from Ontario to Billings. Data last updated July 19, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Billings. Data last updated July 19, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/26:00 am
ONT
- BIL
1 stop4h 09m
Delta
Thu 8/65:20 am
BIL
- ONT
1 stop4h 32m
Delta
Deal found 7/18![Delta logo]()
$411
This Delta deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/101:06 pm
ONT
- BIL
1 stop3h 42m
Delta
Fri 8/146:24 pm
BIL
- ONT
1 stop6h 10m
Delta
Deal found 7/19![Delta logo]()
$361
This Expedia deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/179:20 pm
ONT
- BIL
1 stop14h 45m
Alaska Airlines
Tue 8/256:14 am
BIL
- ONT
1 stop5h 50m
Alaska Airlines
Deal found 7/16![Alaska Airlines logo]()
$336
This Delta deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/176:00 am
ONT
- BIL
1 stop4h 07m
Delta
Wed 8/265:20 am
BIL
- ONT
1 stop4h 32m
Delta
Deal found 7/16![Delta logo]()
$413
This Kiwi.com deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2411:50 am
ONT
- BIL
1 stop7h 18m
Multiple Airlines
Mon 8/319:57 pm
BIL
- ONT
2 stops17h 06m
Multiple Airlines
Deal found 7/17![Multiple Airlines logo]()
$271
This Booking.com deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2512:00 pm
ONT
- BIL
1 stop22h 31m
Alaska Airlines
Mon 8/313:42 pm
BIL
- ONT
1 stop5h 42m
Alaska Airlines
Deal found 7/14![Alaska Airlines logo]()
$372
This United Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/291:18 pm
ONT
- BIL
1 stop6h 42m
United Airlines
Sun 9/67:00 am
BIL
- ONT
1 stop6h 50m
United Airlines
Deal found 7/15![United Airlines logo]()
$409
One-way flights from Ontario to BillingsSearch for one-way flight options from Ontario to Billings. Find affordable one-way fares based on user searches. Data last updated July 19, 2026.
Search for one-way flight options from Ontario to Billings. Find affordable one-way fares based on user searches. Data last updated July 19, 2026.
This Delta deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:00 am
ONT
- BIL
1 stop4h 07m
Delta
Deal found 7/14![Delta logo]()
$156
This Booking.com deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:05 pm
ONT
- BIL
1 stop19h 57m
Alaska Airlines
Deal found 7/14![Alaska Airlines logo]()
$161
This United Airlines deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/259:01 am
ONT
- BIL
2 stops10h 59m
United Airlines
Deal found 7/14![United Airlines logo]()
$226
This United Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/75:00 am
ONT
- BIL
1 stop7h 22m
United Airlines
Deal found 7/17![United Airlines logo]()
$246
This Booking.com deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/284:50 pm
ONT
- BIL
2 stops17h 50m
Alaska Airlines
Deal found 7/17![Alaska Airlines logo]()
$268
This Priceline deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/245:26 pm
ONT
- BIL
1 stop5h 25m
Alaska Airlines
Deal found 7/14![Alaska Airlines logo]()
$281
This Alaska Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/711:29 am
ONT
- BIL
2 stops11h 21m
Alaska Airlines
Deal found 7/17![Alaska Airlines logo]()
$322
This United Airlines deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/31:18 pm
ONT
- BIL
1 stop7h 52m
United Airlines
Deal found 7/14![United Airlines logo]()
$379
This Booking.com deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/37:00 am
ONT
- BIL
2 stops15h 51m
Alaska Airlines
Deal found 7/14![Alaska Airlines logo]()
$498
This United Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/246:00 am
ONT
- BIL
2 stops10h 19m
United Airlines
Deal found 7/16![United Airlines logo]()
$505
Find flight deals from Ontario to Billings
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Billings (BIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 19, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $271 (Kiwi.com) |
One-way from | $156 (Delta) |
Popular in | April |
Cheapest in | February |
Average price | $411 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Billings that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 19, 2026.
Use the filters below to find and compare flights from Ontario to Billings that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioBillings
ONT - BIL
ONTBIL
Ontario
Mon 8/24
11:50 am-8:08 pm
1 stop7h 18m
Billings Logan Intl
Mon 8/31
9:57 pm-2:03 pm
2 stops17h 06m
$275
OntarioBillings
ONT - BIL
ONTBIL
Ontario
Mon 8/10
1:06 pm-5:48 pm
1 stop3h 42m
Billings Logan Intl
Fri 8/14
6:24 pm-11:34 pm
1 stop6h 10m
$361
Quickest round-trip
OntarioBillings
ONT - BIL
ONTBIL
Ontario
Wed 8/12
6:00 am-11:07 am
1 stop4h 07m
Billings Logan Intl
Fri 8/14
5:20 am-8:52 am
1 stop4h 32m
$361
OntarioBillings
ONT - BIL
ONTBIL
Ontario
Tue 8/18
5:05 pm-10:25 pm
1 stop4h 20m
Billings Logan Intl
Sun 8/23
5:20 am-8:52 am
1 stop4h 32m
$361
OntarioBillings
ONT - BIL
ONTBIL
Ontario
Sat 12/5
6:00 am-3:08 pm
1 stop8h 08m
Billings Logan Intl
Wed 12/9
6:00 am-11:09 am
1 stop6h 09m
$384
OntarioBillings
ONT - BIL
ONTBIL
Ontario
Mon 8/17
6:00 am-11:07 am
1 stop4h 07m
Billings Logan Intl
Wed 8/26
5:20 am-8:52 am
1 stop4h 32m
$413
OntarioBillings
ONT - BIL
ONTBIL
Ontario
Sat 8/29
1:18 pm-9:00 pm
1 stop6h 42m
Billings Logan Intl
Sun 9/6
5:07 am-12:12 pm
2 stops8h 05m
$414
OntarioBillings
ONT - BIL
ONTBIL
Ontario
Wed 9/2
7:12 am-6:40 pm
2 stops10h 28m
Billings Logan Intl
Sun 9/6
6:14 am-11:04 am
1 stop5h 50m
$452
OntarioBillings
ONT - BIL
ONTBIL
Ontario
Tue 8/25
3:07 pm-11:29 pm
1 stop7h 22m
Billings Logan Intl
Sun 8/30
6:14 am-4:10 pm
2 stops10h 56m
$457
OntarioBillings
ONT - BIL
ONTBIL
Ontario
Sat 8/8
5:00 am-1:22 pm
1 stop7h 22m
Billings Logan Intl
Thu 8/13
2:29 pm-8:53 pm
1 stop7h 24m
$466
Showing 1-10 of 20 resultsSorted by cheapest first
Compare providers for flights from Ontario to Billings
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Billings in July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-Billings flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Billings flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Billings flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Billings flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Billings flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Ontario to Billings
Have a flexible travel schedule? Discover the best time to fly to Billings from Ontario with our price prediction graph.
ONT-BIL
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Ontario to Billings
Reviews of airlines servicing Billings
Get insights into the airlines that provide service to Billings. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Billings. Reviews last updated July 19, 2026.
Read through reviews of airlines operating flights from Ontario to Billings, such as Alaska Airlines and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Food
7.0
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Food
7.0
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Related info for your journey
Find useful and relevant information for your journey from Ontario to Billings. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Billings flight routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Ontario
Popular flights
Alternative routes for Ontario to Billings
See prices for flight routes from nearby airports that may be better suited for you.
Other flights to Billings
Explore flights to Billings departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 19, 2026.
Complete your trip
Complete your trip to Billings by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Billings by cabin class
Find flights from Ontario to Billings, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Billings flights
Browse other Ontario and Billings flight options. Last updated on July 19, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on July 19, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 2 airlines flying from Ontario to Billings
Discover the top 2 airlines that operate flights from Ontario to Billings. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$260 | Average$370 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$269 | Average$619 | FlexibilityNo cancel fee | On-time75% |